This is only a pre-test. Whatever score you get on this quiz will not affect your final score in the actual course (if you decide to enroll). The questions are designed to determine your in-depth knowledge of quality control.

Displaying 1 to 20 of 20

How much do you know about QC?

1.

Given: you are running two controls on a test, an upper level and a lower level control. The QC procedure defined for this method is 12s control limits. Question: When one control material is out beyond 2 sd control limits, what is the first response in this scenario?

Repeat the control

Run a new control

Reject the run; trouble-shoot

Do nothing

I don't know

2.

Given: Running three controls, an upper level, normal level and a lower level control. The QC procedure defined for this method is 12s control limits. Question: When one control material is out beyond 2 sd control limits, what is the first response in this scenario?

Repeat the control

Run a new control

Reject the run, trouble-shoot

Do nothing

I don't know

3.

Given a QC procedure 12s or 1:2s as a rejection rule - what does that mean?

Reject the run whenever one value is beyond 2s control limits

Repeat the control whenever one value is beyond 2s control limits

Warning of possible problems if one value is beyond 2s control limits

Reject the run whenever two values are beyond 1s control limits

4.

Given a new control material which is supplied with a mean and range of 2sd from the manufacturer, what is the proper use of the mean and range?

Set the lab mean at the manufacturer mean and the lab 2 sd range at the manufacturer's 2 sd range.

Set the lab mean at the manufacturer mean but set the lab 2 sd range using the lab's own data.

Set the lab mean at the experimentally determined mean and set the lab 2 sd range at the manufacturer's 2 sd range

Confirm that the laboratory mean is within the 2sd range of the mean supplied by the manufacturer.

I don't know

5.

The basic principle of statistical QC is to measure a stable sample and identify values that are unexpected by comparison to...

Range of patient specimens

Bottle values from the manufacturer's assay sheet

Mean value and sd determined in the laboratory

I don't know

6.

How do you calculate control limits?

Determine the mean and standard deviation for your laboratory

use the mean and standard deviation provided by the manufacturer

use the mean and standard deviation provided by the proficiency testing survey

use the mean and standard deviation provided by the peer group

7.

What is the best way to choose control rules?

Use 2s control limits for ALL methods in the lab.

Use "Westgard Rules" for ALL methods in the laboratory

Select control rules based on the quality required by the tests and performance observed for the method

Use electronic QC

I don't know

8.

The traditional "Westgard Rules" include a 2s "warning rule." When the warning rule is violated, what action do you take?

Repeat the control

Run a new control

Check the other "Westgard Rules"

Do nothing

I don't know

9.

Which of the following multirule combinations is considered the traditional "Westgard Rules"?

12s/22s/R4s

12s/22s/R4s/41s/10x

12s/22s/R4s/41s

12s/22s/R4s/41s/10x/2of32s

I don't know

10.

Given: Running three controls, an upper level, normal level and a lower level control. The QC procedure defined for this method is the 13s control rule. Question: When one control material is out beyond 2 sd control limits, what is the first response in this scenario?

Repeat the control

Check the other "Westgard Rules"

Reject the run; trouble-shoot

Do nothing

I don't know

11.

Given: Running three controls, an upper level, normal level and a lower level control. The QC procedure defined for this method is the 12s control rule.
Question: When one control material is out beyond 1 sd control limits, what is the first response in this scenario?

Repeat the control

Check the other "Westgard Rules"

Reject the run; trouble-shoot

Do nothing

I don't know

12.

Given: Running three controls, an upper level, normal level and a lower level control. The QC procedure defined for this method is the 12s control rule.
Question: When all three control materials are above the mean, what is the first response in this scenario?

Repeat the control

Check other "Westgard Rules"

Reject the run; trouble-shoot

Do nothing

I don't know

13.

Given: Running two controls, an upper level and a lower level control. The QC procedure defined for this method is the traditional set of "Westgard Rules". Question: When both control materials are out beyond 2 sd control limits, what is the first response in this scenario?

Repeat the control

Check other "Westgard Rules"

Reject the run; trouble-shoot

Do nothing

I don't know

14.

Given: Running two controls, an upper level and a lower level control. The QC procedure defined for this method are the traditional "Westgard Rules". Question: When both control materials are below their respective means, but within 1 SD of the mean, what is the first response in this scenario?

Repeat the control

Check other "Westgard Rules"

Reject the run; trouble-shoot

Do nothing

I don't know

15.

Given: Running two controls, an upper level and a lower level control. The QC procedure defined for this method are the traditional "Westgard Rules". Question: When both control materials are below their respective means, and the values for the previous 4 runs were also below the mean, what is the first response in this scenario? Assume the 2 SD warning rule has been triggered already.

Repeat the control

Check other "Westgard Rules"

Reject the run; trouble-shoot

Do nothing

I don't know

16.

Given: Running two controls, an upper level and a lower level control. The QC procedure defined for this method are the traditional "Westgard Rules". Question: The upper control value is above 1s, while the lower control is below 1s, what is the first response in this scenario?

Repeat the control

Check other "Westgard Rules"

Reject the run; trouble-shoot

Do nothing.

I don't know.

17.

Given: Running two controls, an upper level and a lower level control. The QC procedure defined for this method are the traditional "Westgard Rules". Question: The upper control value is above 2s, while the lower control is below 2s, what is the first response in this scenario?

Repeat the control

Check other "Westgard Rules"

Reject the run; trouble-shoot

Do nothing

I don't know

18.

Given: Running two controls, an upper level and a lower level control. The QC procedure defined for this method are the traditional "Westgard Rules". The last four runs have been in control as well. Question: The upper control value is above 2s, while the lower control is below 1s, what is the first response in this scenario?

Repeat the control

Check other "Westgard Rules"

Reject the run; trouble-shoot

Do nothing

I don't know

19.

Given a QC procedure defined as 10:x or "ten-mean" used as a "warning rule" - how does a laboratory implement this?

Reject the run whenever 10 values are on one side of the mean

Repeat the control whenever 10 values are on one side of the mean

Warning of a possible problem is indicated when 10 values are on one side of the mean. Further investigation should be conducted.

Reject the run whenever x values are 10 SDs from the mean.

20.

Given a cholesterol test where the low control has a mean of 190 and SD of 3, and the high control material has a mean of 250 and SD of 4, and given that the QC procedure is defined as 13s/22s /R4s what is proper interpretation when the control values observed within a run are 197 and 243?